Mechanical Specifications and Installation
MPS75SLE Hardware Manual
2.4. Attaching the Payload to the Stage
To prevent damage to the payload or stage, test the operation of the stage before the payload is attached.
Aerotech recommends that customers use a representative payload during start-up to prevent accidental
damage to the stage and the payload. Proceed with the electrical installation and test the motion control
system in accordance with the system documentation. Document all results for future reference. For
information on electrical installation refer to
Chapter 3
and the documentation delivered with the stage.
N O T E :
Stages that ship with Aerotech controls are often tuned with a representative payload based on
the information provided at the time of order. If the stage is started up without a payload, the servo gains
provided by Aerotech with the shipment may not be appropriate and servo instability can occur. Refer to
the controller help file for tuning assistance.
The payload must be flat, rigid, and comparable to the stage in quality to maintain optimum performance.
N O T E :
For valid system performance, the mounting interface should be flat within 5 µm.
W A R N I N G :
Refer to the dimensions in
Section 2.2.
for maximum allowable thread
engagement. A screw extending through the stage table can affect travel and damage the
stage.
Refer to
Section 2.2.
for the dimension drawing for mounting hole locations and screw lengths.
Application loads should be symmetrically distributed whenever possible (i.e., the payload should be
centered on the stage table and the entire stage should be centered on the support structure). If cantilevered
loads are applied, refer to
Figure 2-7
to find the maximum allowable load.
In
Figure 2-7
, three curves are shown for different loading conditions. The vertical curve, Lv, is for situations
where the stage is mounted in a vertical orientation and the payload is mounted to the table top with its
center of gravity extended outward. If a cantilevered load situation is used, first determine if it is a pitch
cantilever or roll cantilever system based on
Figure 2-8
. Measure the cantilever length, then find the
corresponding load value from
Figure 2-7
.
Lr
Lp
Lv
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
25
50
75
Load Distance from Stage Center (mm)
Maximum Load (kg)
100
125
150
175
200
Figure 2-7:
Load Capability of MPS75SLE Series Stages
12
Chapter 2
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